Abstract

Squeezed vacuum permits adjustment of its relative phase to a chosen signal. If the signal is used as the probe in an interferometric measurement, the signal-to-noise ratio can be improved. We propose a system that generates squeezed vacuum, which consists of a laser diode that produces amplitude squeezed states and is phase-locked to a coherent signal, and an alternate system consisting of two phase-locked laser diodes.

© 1991 Optical Society of America

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